Alpha Channel

Chat about the original Pixelmator.
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2018-03-24 21:35:03

I opened a TIF file with an alpha channel (created in Photoshop), and I can't figure out how to edit the alpha channel (Pixelmator, not Pro). I can see the transparency in the image, which means I also can't edit the part of the image where the alpha channel is black. I can't find anything about the alpha channel anywhere (except some mentions in the Pro forum). How do I show/edit the alpha channel?